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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2020
Text block [abstract]  
Reconciliation of Goodwill
 
Million US dollar
  
30 June 2020
   
31 December 2019
 
Acquisition cost
    
Balance at end of previous year
  
 
128 119
 
  
 
133 316
 
Effect of movements in foreign exchange
   (10 658)    53 
Acquisitions through business combinations
   73    682 
Disposals through the sale of subsidiaries
   —      (22) 
Hyperinflation monetary adjustments
   51    171 
Reclassified as held for sale
   —      (6 081) 
  
 
 
   
 
 
 
Balance at end of the period
  
 
117 585
 
  
 
128 119
 
  
 
 
   
 
 
 
Impairment losses
    
Balance at end of previous year
  
 
(5
) 
  
 
(5
) 
Impairment losses
   (2 500)    —   
  
 
 
   
 
 
 
Balance at end of the period
  
 
(2 505
) 
  
 
(5
) 
  
 
 
   
 
 
 
Carrying amount
    
at 31 December 2019
  
 
128 114
 
  
 
128 114
 
at 30 June 2020
  
 
115 080
 
  
 
—  
 
Summary of Carrying Amount of Goodwill Allocated to Different Cash-generating Units
The carrying amount of goodwill was allocated to the different cash-generating units as follows:
 
Million US dollar
Cash-generating unit
  
30 June 2020
   
31 December 2019
 
United States
   33 452   33 451 
Rest of North America
   1 956    1 984 
Mexico
   10 808    13 175 
Colombia
   16 264    18 647 
Rest of Middle Americas
   24 211    25 257 
Brazil
   3 341    4 539 
Rest of South America
   1 062    1 101 
Europe
   2 220    2 277 
South Africa
   9 420    13 500 
Rest of Africa
   5 079    6 691 
China
   3 046    3 095 
Rest of Asia Pacific
   3 675    4 397 
Global Export
   545    —   
  
 
 
   
 
 
 
Total carrying amount of goodwill
  
 
115 080
 
  
 
128 114
 
  
 
 
   
 
 
 
Summary of Weighted Average Cost of Capital
The WACC applied in US dollar nominal terms were as follow, with the higher WACC applied in the worst-case scenario:
 
Cash-generating unit
  
30 June 2020
   
31 December 2019
 
Colombia
   6% - 7%    6% 
Rest of Middle Americas
   
10% - 11%
    9% 
South Africa
   7% - 8%    7% 
Rest of Africa
   10% - 12%    10% 
Rest of Asia Pacific
   8%    —